Classifications

• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
  • A63G21/00—Chutes; Helter-skelters
  • A63G21/18—Water-chutes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
  • C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
  • C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
  • C08G18/6225—Polymers of esters of acrylic or methacrylic acid
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/80—Masked polyisocyanates
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
  • C09D175/04—Polyurethanes

Definitions

• the present invention relates to the use of a polyurethane coating for improving, maintaining and repairing water slides.
• Standard plastic water slides are designed with a so-called “gelcoat” layer on the sliding surface, also known as the water surface side.
• the term “gelcoat” is used somewhat vaguely as a synonym for a variety of different coatings.
• the surfaces usually consist of a polymer layer. This can be based on epoxy, acrylate or polyurethane. In their written warranty conditions, the manufacturers specify that the surfaces must be regularly provided with a protective wax layer depending on the level of wear and tear. It is recommended that the wax layer be renewed every 1 to 3 months. Similar to motor vehicles, hard wax is used, which then has to be polished.
• the sliding surface of a water slide is subjected to abrasive stress due to the sliding and especially the water flowing through it. If the surfaces are not re-waxed early enough and/or not often enough, the abrasion causes rough surfaces. The abrasion can even completely wear away or remove the gelcoat layer, exposing the structure-supporting reinforcement (usually fiberglass). At this point at the latest, the gelcoat layer must be renewed in order to achieve this To be able to continue using the water slide safely and further waxing would no longer produce a lasting smoothing effect.
• the slide surfaces Even without extreme outdoor conditions and despite regular waxing, the slide surfaces generally show a pronounced micro-roughness that deviates from their original state after just a short period of use, which promotes the deposition of fine particles or contamination. This contamination then leads to a further increase in roughness.
• the deposits include in particular chlorides, (lime) salts, other fine particles or suspended matter from the water used (varies regionally).
• the deposits and dirt increase the frictional resistance, which reduces the sliding speeds and, in the case of so-called "pressurized water acceleration" of sliding people in horizontal or ascending slide areas, requires higher pump performance and thus a higher energy requirement.
• the resulting contamination which, depending on the region, the operating and environmental conditions, occurs after just a few weeks of operating a new slide, means that either the contamination and the associated greater roughness have to be accepted by the operator or have to be cleaned very aggressive cleaning agents are used.
• the last resort is mechanical cleaning using abrasive processes (grinding). With shorter cleaning intervals and more intensive cleaning, wear increases and the lifespan of the slide is shortened.
• Newly applied gelcoat also represents a wear layer. It has the same problems as the original coating in a new slide. Although longer service lives are achieved through greater layer thicknesses, the basic problem of low abrasion resistance is not solved.
• the internal stresses are caused by the interaction with poor bonding between two differently expanding materials, as well as the dynamic stress when sliding and the thermal stress (day/night, summer/winter) of the slide.
• the task is therefore to provide a coating for water slides that remains permanent for a period of at least 3-6 months without the risk of chipping, can be easily applied or reworked and, due to its higher abrasion resistance, offers a more cost-effective, simpler and therefore better maintenance .Cleaning concept permitted.
• This task is solved by using a water-based 2-component polyurethane resin (hereinafter "2K-PUR”), which is applied to a water slide in small layer thicknesses ( ⁇ 100 ⁇ m).
• the polyurethane resin can be diluted with water, is solvent-resistant when fully reacted and is highly cross-linked. It is characterized by strong chemical resistance and very good abrasion resistance. Small layer thicknesses ( ⁇ 100 ⁇ m) have a lower risk of adhesion failure between the slide material and the applied coating. If adhesion failure does occur, the risk of injury is lower with a thin layer than with brittle “thick” coatings.
• the 2K PUR is formed by a resin component A and a hardener component B.
• the resin component (A) preferably contains an anionic polyacrylate dispersion, a defoamer, a silicone surfactant, a polyacrylate-based one Surface additive, a catalyst (e.g. zinc-amine complex) and a rheology modifier (in particular a hydrophobically modified ethoxylated urethane).
• the hardener component (B) is preferably a polyisocyanate, in particular a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).
• Abrasion resistance is characterized by the avoidance or reduction of abrasive wear. “Abrasion” is the loss of material, which, among other things, caused by the mechanical impact of one friction partner on the other or by a flowing medium. Particles that are released from the material are called abrasion. Abrasion resistance can be determined by various methods, such as a scrub test.
• the layer thickness is less than 100 ⁇ m but more than 3 ⁇ m.
• the layer thickness is between 5 and 90 ⁇ m, preferably between 10-20 and 85 ⁇ m, very preferably between 30 and 80 ⁇ m, more preferably around 75 ⁇ m.
• layer thicknesses of 3-10 ⁇ m, preferably around 5 ⁇ m, are desirable.
• the delivery mixture with approx. 60% active ingredient content can be diluted with up to 5 parts water. This results in the variation of the active ingredient content from approx. 5% to approx. 60% of the aqueous solution for flexible adjustment of the layer thickness, i.e. the coating can be used as initial equipment when the water slide is delivered or as later basic protection (with a small amount of water added ⁇ 100 ⁇ m) and as Care/wear layer (with high water addition 3-10 ⁇ m, preferably around 5 ⁇ m (diluted 3 / to 1:5 with water) can be used. Due to the high cross-linking of the product, this leads to better abrasion resistance and cleanability.
• the surface preparation must be less abrasive. It has proven to be advantageous to carefully sand the surface or, better yet, blast it using suitable methods in order to remove less intact layer thickness. Otherwise, removing any colored gelcoat that was factory applied when the water slide was manufactured may result in fiberglass being exposed. Blasting can prepare the surface evenly in both low and high points, while grinding only mechanically wears the high points. To complete a substrate preparation, the high points must be taken away to the low points. Blasting achieves a higher roughness for a better mechanical bond of the 2K PUR to be applied according to the invention. This more targeted substrate preparation also results in less damage to the substrate and particles that reduce adhesion are removed.
• blasting is therefore understood to mean a mechanical surface treatment with blasting agents, in which the surface is pelted with granular materials of different shapes and sizes.
• the granular material has an increased relative speed to the surface due to external influences. This speed is communicated to the grain either by throwing or by a flowing carrier medium. When thrown, the grain is caught by rotating arms of a blast wheel. When transported through a transport medium, the latter first receives kinetic energy via pumps or compressors before the grain is introduced into the transport medium. Air or water are generally considered as transport media (wet blasting). The accelerated grain then hits the rough surface of a workpiece on which it is intended to perform a cutting function.
• the blasting effect varies depending on the size relationship between the roughness of the surface and the grain size of the blasting agent.
• the coating applied according to the invention extends the life of the factory-applied gelcoat better than waxing.
• the coating also allows for quick revision even if the coating is partially worn. (Initial maintenance), which means that more costly repairs and/or new investments will have to be made later.
• the treatment (layers of approx. 3 to 10 ⁇ m (2-PUR diluted up to 1:5 with water)) can be used at shorter intervals to simply rework already dull or rough surfaces. All that is required for “care” is light cleaning with pressurized water and, if necessary, the addition of cleaning pads and light chemical cleaners, and the application of very thin 2-PUR layers. Only small scratches and micro-defects should be filled in and repaired locally during initial care. This creates a smooth and even surface with low frictional resistance. If the care on the still flat and intact surface areas shows insufficient adhesion, the success of the repair measure would still be ensured. Loose, non-adhering "care layers" (with a layer thickness of approx. 3 to 10 ⁇ m) represent neither a defect nor a restriction on use.
• “porviva WSC050" ("transparentgloss”,”transparentmatt” or “color gloss” (desired color)) is available as a 2-component PUR coating
• Component A resin
• component B hardener
• Component B must be completely emptied into the container for component A.
• the mixing process must be carried out until homogeneous and streak-free, but at least 3 minutes. It is best not to use the material from the delivery container afterwards, but rather sieve it and transfer it to a clean container and mix again for approx. 1 minute.
• the temperature of the two components should be between 15 and 25 °C when mixing.
• “porviva WSC050” is applied from a paint tray with a drainage surface by rolling in a criss-cross pattern.
• the best results are achieved with a solvent-resistant, lint-free painting roller with a 6-7 mm pile.
• the application can also be done by spraying. Connection points should be completed within 8-10 minutes at the latest, otherwise rolling marks may become visible.
• the application to a standard water slide is made at a thickness of 80 ⁇ m.
• 2-component epoxy resins are used as gelcoats 1 and 2 and are also applied in the appropriate thickness.
• Designation Resin component Hardener component 2K PURE Component A of porviva WSC050 (see above)
• Component B of porviva WSC050 (see above)
• Benzyl alcohol 50% 3-Aminomethyl-3,5,5-trimethylcyclohexylamine 20%
• wet abrasion resistance is tested using a standard "scrub" test in accordance with DIN EN 13300:2002-11 (Coating materials - Water-based coating materials and coating systems for interior walls and ceilings - Classification; German version EN 13300:2001 + AC:2002).
• DIN EN 13300:2002-11 Coating materials - Water-based coating materials and coating systems for interior walls and ceilings - Classification; German version EN 13300:2001 + AC:2002.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Paints Or Removers (AREA)
• Laminated Bodies (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

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ID=83149251

Family Applications (2)

Family Applications After (1)

Country Status (4)

Citations (5)

• 2022
  • 2022-08-31 EP EP22193223.9A patent/EP4332139A1/fr not_active Withdrawn
• 2023
  • 2023-08-23 WO PCT/EP2023/073133 patent/WO2024046842A1/fr not_active Ceased
  • 2023-08-23 US US19/107,376 patent/US20250345713A1/en active Pending
  • 2023-08-23 EP EP23768784.3A patent/EP4581073A1/fr active Pending
  • 2023-08-23 CN CN202380076852.6A patent/CN120153004A/zh active Pending

Patent Citations (5)

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